libutil: remove sinkToSource eof callback

this is only used in one place, and only to set a nicer error message on
EndOfFile. the only caller that actually *catches* this exception should
provide an error message in that catch block rather than forcing support
for setting error message so deep into the stack. copyStorePath is never
called outside of PathSubstitutionGoal anyway, which catches everything.

Change-Id: Ifbae8706d781c388737706faf4c8a8b7917ca278

1 files changed, 1 insertions, 5 deletions

diff --git a/src/libutil/serialise.hh b/src/libutil/serialise.hh
index c9294ba2d..0632e3109 100644
--- a/src/libutil/serialise.hh
+++ b/src/libutil/serialise.hh
@@ -338,11 +338,7 @@ std::unique_ptr<FinishSink> sourceToSink(std::function<void(Source &)> fun);
  * Convert a function that feeds data into a Sink into a Source. The
  * Source executes the function as a coroutine.
  */
-std::unique_ptr<Source> sinkToSource(
-    std::function<void(Sink &)> fun,
-    std::function<void()> eof = []() {
-        throw EndOfFile("coroutine has finished");
-    });
+std::unique_ptr<Source> sinkToSource(std::function<void(Sink &)> fun);
 
 
 void writePadding(size_t len, Sink & sink);